Lithium battery intermediate state stabilization technology breakthrough, faster charging

    The international edition of the journal Angewandte Chemie International Edition recently published an article pointing out that new progress has been made in the research on the "intermediate state" structure and transmission characteristics of lithium iron phosphate (LiFePO4) lithium batteries.

    Researchers from the University of Tokyo and Tokyo Institute of Technology said the findings could help speed up the reaction of lithium batteries and significantly shorten battery charging time.

Lithium battery intermediate state

    Earlier, some researchers discovered that the existence of the "intermediate state" can accelerate the battery charging and discharging reactions, but there was not enough experimental evidence to support it at the time. Subsequent studies showed that due to the short life of the "intermediate state", the possibility of conducting a systematic investigation of its reaction principle is very small.

    The research team led by Professor Atsuo Yamada of the Institute of Engineering at the University of Tokyo found that the electrons are covered with a stripe-like thin film layer, and the lithium ions do not interfere with the stripe-like thin film layer. In addition, the lithium/electron conductivity in the "intermediate state" is higher than that in the charging or discharging state.

    The researchers explained that because lithium ions and electrons move faster under "intermediate state" conditions, it can accelerate the charging and discharging reactions of lithium batteries.

    Atsuo Yamada said that once the life of the "intermediate state" is extended, the synthesis conditions in the battery reaction will also be optimized. At present, the team has successfully stabilized the "intermediate state" content at 100%, which is conducive to improving conductivity. Through the new research program, the development of fast-charging batteries will also usher in new breakthroughs.